Steve:
CHDIR.. gets you back to the upper level
CHDIR. gets you to the disk root

just like "CD" command in MS-DOS

About language: maybe on boot the Oric thinks a key has been pressed. Go back to the main menu, then you can select English.

About other tools: I first planned adapting several existing tools, and trying to make a kind of "total commander" (quite optimistic I think), but as we discovered bugs for several weeks/months, we needed first to get a 100% working kernel before spending time on additional tools (which then could need being fixed too).
We found more problems than expected and I think Michel (who already had provided a tremendous effort coding the whole thing), in the same idea of "not wasting time while it's not 100% sure", didn't change the docs each and every time he made a bugfix.
In the meantime I got carried away from the project by life, so I'm not sure I got up-to-date technical docs.

So 1st thing to do would be more testing to ensure there are no bugs left, then find back Michel's docs and check if they are up-to-date (maybe they are, no offense intended to Michel, it's just me that didn't follow in detail the end of the project). Then we can work on additional tools

Thanks. The language thing seems to be working now. It keeps booting to the English version

I'm finding the structure difficult to get to grips with. I like to setup the old function key layout so put that in the INIST command but it doesn't work because the file is hidden away in a subfolder.

What I'm struggling with is how to load something from a folder/directory from the main one. Is that possible? You might want to load at bootup, or have a HIRES screen loader that loads from files stored in the subdirectory. Can that be done.

I don't think you can Steve. To load your file, you must have them all in the same directory, or actually change directory to the one holding the file you want to load, before loading it.
That may be a bit disappointing, but there wasn't enough room left in the kernel (by far!) to change all the commands and have them interpreting a path instead of a simple filename. It certainly could be done technically, but it's already a miracle Michel managed to put eveything in the kernel / new bank ("no room" is what held me for years trying to implement the directories by myself).